Model Comparison

GPT-5.4 vs Muse Spark

GPT-5.4 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

GPT-5.4 outperforms in 6 benchmarks (ARC-AGI v2, GPQA, MMMU-Pro, SWE-Bench Pro, Tau2 Telecom, Terminal-Bench 2.0), while Muse Spark is better at 1 benchmark (Humanity's Last Exam).

GPT-5.4 significantly outperforms across most benchmarks.

Thu Apr 09 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Thu Apr 09 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Meta
Muse Spark
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only GPT-5.4 specifies input context (1,000,000 tokens). Only GPT-5.4 specifies output context (128,000 tokens).

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Meta
Muse Spark
Input- tokens
Output- tokens
Thu Apr 09 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and Muse Spark support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-5.4

Text
Images
Audio
Video

Muse Spark

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-5.4

Proprietary

Closed source

Muse Spark

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Muse Spark was released on 2026-04-08.

Muse Spark is 1 month newer than GPT-5.4.

GPT-5.4

Mar 5, 2026

1 months ago

Muse Spark

Apr 8, 2026

1 days ago

1mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Higher ARC-AGI v2 score (73.3% vs 42.5%)
Higher GPQA score (92.8% vs 89.5%)
Higher MMMU-Pro score (81.2% vs 80.4%)
Higher SWE-Bench Pro score (57.7% vs 52.4%)
Higher Tau2 Telecom score (98.9% vs 91.5%)
Higher Terminal-Bench 2.0 score (75.1% vs 59.0%)
Meta
Higher Humanity's Last Exam score (58.4% vs 39.8%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
Meta
Muse Spark

FAQ

Common questions about GPT-5.4 vs Muse Spark

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and Muse Spark is made by Meta. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. Muse Spark scores Tau2 Telecom: 91.5%, GPQA: 89.5%, CharXiv-R: 86.4%, ScreenSpot Pro: 84.1%, IPhO 2025: 82.6%.
GPT-5.4 supports 1.0M tokens and Muse Spark supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
GPT-5.4 is developed by OpenAI and Muse Spark is developed by Meta.